mirror of
https://github.com/gopl-zh/gopl-zh.github.com.git
synced 2024-11-13 01:43:42 +00:00
39 lines
585 B
Go
39 lines
585 B
Go
|
// Copyright © 2016 Alan A. A. Donovan & Brian W. Kernighan.
|
||
|
|
// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
|
||
|
|
|
||
|
|
// See page 229.
|
||
|
|
|
||
|
|
// Pipeline2 demonstrates a finite 3-stage pipeline.
|
||
|
|
package main
|
||
|
|
|
||
|
|
import "fmt"
|
||
|
|
|
||
|
|
//!+
|
||
|
|
func main() {
|
||
|
|
naturals := make(chan int)
|
||
|
|
squares := make(chan int)
|
||
|
|
|
||
|
|
// Counter
|
||
|
|
go func() {
|
||
|
|
for x := 0; x < 100; x++ {
|
||
|
|
naturals <- x
|
||
|
|
}
|
||
|
|
close(naturals)
|
||
|
|
}()
|
||
|
|
|
||
|
|
// Squarer
|
||
|
|
go func() {
|
||
|
|
for x := range naturals {
|
||
|
|
squares <- x * x
|
||
|
|
}
|
||
|
|
close(squares)
|
||
|
|
}()
|
||
|
|
|
||
|
|
// Printer (in main goroutine)
|
||
|
|
for x := range squares {
|
||
|
|
fmt.Println(x)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//!-
|